66219038 has 16 divisors (see below), whose sum is σ = 104219520. Its totient is φ = 31514400.

The previous prime is 66218993. The next prime is 66219067. The reversal of 66219038 is 83091266.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 66218989 and 66219007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4973 + ... + 12536.

It is an arithmetic number, because the mean of its divisors is an integer number (6513720).

Almost surely, 2^66219038 is an apocalyptic number.

66219038 is a deficient number, since it is larger than the sum of its proper divisors (38000482).

66219038 is a wasteful number, since it uses less digits than its factorization.

66219038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17603.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 66219038 is about 8137.5080952341. The cubic root of 66219038 is about 404.5705716051.

The spelling of 66219038 in words is "sixty-six million, two hundred nineteen thousand, thirty-eight".